code: def test_trxf_export(self):
      logging.basicConfig(stream=sys.stdout, level=logging.INFO)
      logger = logging.getLogger(__name__)
  
      df = create_test_df()
      TARGET_LABEL = "target"
      POS_VALUE = "True"
      x_train = df.drop(columns=[TARGET_LABEL])
      y_train = df[TARGET_LABEL]
  
      estimator = RipperExplainer()
      estimator.fit(x_train, y_train, target_label=POS_VALUE)
      actual_rule_set = estimator.explain()
      logger.info(actual_rule_set)
  
      feature = Feature("int_col")
      predicate = Predicate(feature, Relation.EQ, 1)
      conjunction = Conjunction([predicate])
      expected_rule_set = DnfRuleSet([conjunction], "True")
      self.assertEqual(actual_rule_set, expected_rule_set)
  
      assignment = {"int_col": 1, "float_col": 1.2, "str_col": "foo"}
      result = actual_rule_set.evaluate(assignment)
      self.assertTrue(result)
  
file_path: AIX360/tests/rule_induction/ripper/test_ripper.py
imports: import logging
  import sys
  import unittest
  import pandas
  from aix360.algorithms.rule_induction.ripper.ripper import RipperExplainer
  from aix360.algorithms.rule_induction.trxf.core.conjunction import Conjunction
  from aix360.algorithms.rule_induction.trxf.core.dnf_ruleset import DnfRuleSet
  from aix360.algorithms.rule_induction.trxf.core.feature import Feature
  from aix360.algorithms.rule_induction.trxf.core.predicate import Predicate, Relation
label_desc: Use image node_id 2 for calling the TestRipper obj's underlying member method code with example usage: obj.test_trxf_export() without return types